io_submit - submit asynchronous I/O blocks for processing
int io_submit(aio_context_t ctx_id, long nr, struct iocb **iocbpp);
Link with -laio.
io_submit() queues nr I/O request blocks for processing in the AIO
context ctx_id. iocbpp should be an array of nr AIO control blocks,
which will be submitted to context ctx_id.
On success, io_submit() returns the number of iocbs submitted (which
may be 0 if nr is zero). For the failure return, see NOTES.
EAGAIN Insufficient resources are available to queue any iocbs.
EBADF The file descriptor specified in the first iocb is invalid.
EFAULT One of the data structures points to invalid data.
EINVAL The aio_context specified by ctx_id is invalid. nr is less than
0. The iocb at *iocbpp is not properly initialized, or the
operation specified is invalid for the file descriptor in the
ENOSYS io_submit() is not implemented on this architecture.
The asynchronous I/O system calls first appeared in Linux 2.5, August
io_submit() is Linux-specific and should not be used in programs that
are intended to be portable.
Glibc does not provide a wrapper function for this system call.
The wrapper provided in libaio for io_submit() does not follow the
usual C library conventions for indicating error: on error it returns a
negated error number (the negative of one of the values listed in
ERRORS). If the system call is invoked via syscall(2), then the return
value follows the usual conventions for indicating an error: -1, with
errno set to a (positive) value that indicates the error.
io_cancel(2), io_destroy(2), io_getevents(2), io_setup(2)
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